What is a planetary nebula neither a planet nor a nebula?

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asked Mar 18, 2019 25.3k views

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Godidier · Answer 1 · 2019-03-20T15:15:20+0000

a planetary nebula is a (ring-shaped) type of nebula formed by an expanding shell of gas around an aging star. *a planetary nebula is a type of nebula*. im not completely certain though. i might be wrong.

What is a planetary nebula neither a planet nor a nebula?

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